Relationships between volcano gravitational spreading and magma intrusion

Delcamp, Audray; Vries, Benjamín van Wyk de; James, Michael; Gailler, Lydie-Sarah; Lebas, Élodie

doi:10.1007/s00445-011-0558-9

Cited by 37 publications

(28 citation statements)

References 56 publications

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“…For brittle layer/ductile layer ratios >1.25 they obtained a single graben that traverses the volcanic edifice and that passes above the intrusive complex, resembling the case of Nevado volcano structure. Reference [20] validated their model results with field observations on eroded volcanic remnants as well as on active volcanoes by means of geophysical evidence. They offer the example of a dormant volcano, Piton des Neiges of La Réunion Island in the Indian Ocean, where a gravimetric survey shows a close association between the (positive) gravity anomaly and the star-shaped pattern of escarpments on the volcano.…”

Section: L1 Nevado Volcanomentioning

confidence: 81%

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Southward Migration of Magmatic Activity in the Colima Volcanic Complex, Mexico: An Ongoing Process

Álvarez¹,

Yutsis²

2015

IJG

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The Colima Volcanic Complex trends in a nearly N-S direction in western Mexico, and one of its structures, Colima volcano, is the most historically active volcano in the country. Immediately to the N, there is another volcanic center called El Cántaro volcano, whose activity started around 1.7 Ma in its N portion and migrated to the S in various episodes. Volcanic activity migrated further south, from El Cántaro to the Colima Volcanic Complex where the southernmost manifestation, Hijos del Volcán domes, is located on the south slope of Fuego volcano. The above date appears to mark initiation of the rather continuous volcanic activity in the area. It has been noted that these volcanic manifestations lie on, or near the Rivera-Cocos inland plate boundary. Colima's Fuego volcano is also the closest to the Middle America Trench, among the polygenetic volcanoes in Mexico. We submit that the anomalous location of volcanism in this area originates in an anomalous subduction process of the Rivera and Cocos plates and evoke a tectonic model, proposed elsewhere, to support the idea. Modeling gravimetric and aeromagnetic data we locate the magma chambers of the Fuego (active) and Nevado (extinct) volcanoes within a 65 mGals negative Bouguer anomaly elongated in a nearly N-S direction. The corresponding aeromagnetic map displays a magnetic high over the southern portion of the Fuego volcano edifice. We found two additional, associated structures whose anomalies have not been previously reported, which appear to follow the southward magmatic migration pattern. One of them is a collapse structure with a circular topographic expression, and the southernmost is a low-density intrusion ~1 km below sea level, associated with a moderate topographic bulge at the surface that we interpret as a magma body. Five lines cross the anomalies; gravimetric and magnetic fields are concurrently modeled along them to locate the magmatic bodies. In addition to the 2-D models we perform 3-D gravimetric and

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Section: L1 Nevado Volcanomentioning

confidence: 81%

“…The E-W trending fault system creates a shallow graben centered beneath the summit of Nevado de Colima. According to [20] graben structures occur in volcanoes upon magma intrusion. Their models show that the intrusive complex develops in continual competition between upward bulging and lateral gravity spreading.…”

Section: L1 Nevado Volcanomentioning

confidence: 99%

Southward Migration of Magmatic Activity in the Colima Volcanic Complex, Mexico: An Ongoing Process

Álvarez¹,

Yutsis²

2015

IJG

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“…Gelatine experiments by Hyndman and Alt (1987), McGuire and Pullen (1989), Delcamp et al (2012b), for instance, show that dykes orientate along the long axis of an elongated volcanic edifice, albeit with some divergence at the edifice periphery (Tibaldi et al 2014). In addition, the experiments of McGuire and Pullen (1989) show that: (i) shallow dykes below edifices stop propagating upward, and start propagating laterally to give rise to a lateral fissure eruption, and (ii) the behaviours of intruding dykes differ according to their initial position with respect to the summit of the edifice.…”

Section: Effects Of Anisotropic Stressmentioning

confidence: 97%

“…Grease Sill and laccolith emplacement Johnson and Pollard (1973), Pollard and Johnson 1973) Silicone putty Dyke nucleation Cañón-Tapia and Merle (2006) Acryl gel Air Dyke propagation driven by magma pulses Maaløe (1987) Oil Dyke propagation Maaløe (1987) Agar-sugar gel Water-glycerol solution Dyke propagation along level of neutral buoyancy Lister and Kerr (1991) (continued) Merle and Vendeville (1995), Román-Berdiel et al (1995, 1997, Benn et al (1998Benn et al ( , 2000, Román-Berdiel (1999), Acocella et al (2000Acocella et al ( , 2001Acocella et al ( , 2004, Roche et al (2000 , Kervyn et al (2009), Delcamp et al (2012b "Creamed" honey Deflating sill-like intrusions Holohan et al (2008aHolohan et al ( , b, 2013 Ignimbrite powder…”

Section: Conceptual Magmamentioning

confidence: 98%

Laboratory Modelling of Volcano Plumbing Systems: A Review

Galland

Holohan

Vries

et al. 2015

Advances in Volcanology

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We review the numerous experimental studies dedicated to unravelling the physics and dynamics of various parts of a volcanic plumbing system. Section 1 lists the model materials commonly used for model magmas or model rocks. We describe these materials' mechanical properties and discuss their suitability for modelling sub-volcanic processes. Section 2 examines the fundamental concepts of dimensional analysis and similarity in laboratory modelling. We provide a step-by-step explanation of how to apply dimensional analysis to laboratory models in order to identify fundamental physical laws that govern the modelled processes in dimensionless (i.e. scale independent) form. Section 3 summarises and discusses the past applications of laboratory models to understand numerous features of volcanic plumbing systems. These include: dykes, cone sheets, sills, laccoliths, caldera-related structures, ground deformation, magma/fault interactions, and explosive vents. We outline how laboratory models have yielded insights into the main geometric and mechanical controls on the development of each part of the volcanic

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“…Isso intensifica o fraturamento do teto, facilitando a intrusão e erupção de parcelas de magma, o desenvolvimento de amplo sistema magmático-hidrotermal e sua interação com fluidos meteóricos. Intrusões centrais, na forma de lacó-lito ou domo estrutural, acarretam deslocamento vertical expressivo (hm-km) em centros vulcano-plutônicos maduros (Smith & Bailey 1968;Kennedy et al 2012), encerrando o ciclo do edifício vulcânico (Delcamp et al 2012).…”

Section: Modelo Integradounclassified

Alojamento do granito Lavras e a mineralização aurífera durante evolução de centro vulcano-plutônico pós-colisional, oeste do Escudo Sul-riograndense: dados geofísicos e estruturais

et al. 2015

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RESUMO:A construção do granito Lavras é analisada mediante integração de dados geológicos, geofísicos e estruturais originais e compilados, em consonância com a evolução do centro vulcano-plutônico. Esse centro engloba o complexo intrusivo Lavras do Sul e a sequência traquiandesítica da Formação Hilário (604 -590 Ma), ambos formados em posição de antepaís durante o período pós-colisional da Orogênese Dom Feliciano, no oeste do Escudo Sul-riograndense. A análise de estruturas rúpteis e lineamentos magnéticos indica que o vulcanismo teve início próximo ao colapso dessa orogenia, condicionado por sistemas transtensivos dextrais NW-SE a WNW-ESE que invertem para sinistrais com o relaxamento tectônico. A formação do complexo intrusivo, principiando com a intrusão subvulcânica do monzonito Tapera no norte, acompanhou a inversão no regime de stress regional ao longo de zona de falha N70-75°W que o seciona. Ao final, ocorreu o posicionamento do granito Lavras no sul, o qual possui dimensões modestas (325 km³) e forma tabular (comprimento -L: espessura -E ≈ 3:1) afinando para sul, como deduzido dos dados gravimétricos. Dois domínios composicional--estruturais, equivalentes aos granitos magnesianos centrais (granodiorito e monzogranito) e os ferrosos da borda (sienogranito e feldspato alcalino granito), são definidos pela trama ASM (anisotropia de suscetibilidade magnética). Tais dados, aliados aos de estruturas rúpteis, apontam um pluton multicíclico construído em dois eventos de ressurgência, envolvendo: (1)

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Relationships between volcano gravitational spreading and magma intrusion

Abstract: International audienc

Cited by 37 publications

References 56 publications

Southward Migration of Magmatic Activity in the Colima Volcanic Complex, Mexico: An Ongoing Process

Southward Migration of Magmatic Activity in the Colima Volcanic Complex, Mexico: An Ongoing Process

Laboratory Modelling of Volcano Plumbing Systems: A Review

Alojamento do granito Lavras e a mineralização aurífera durante evolução de centro vulcano-plutônico pós-colisional, oeste do Escudo Sul-riograndense: dados geofísicos e estruturais

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